"SequoiaDB Giant Sequoia Database" attachNode() Overview 2

return value

If there is no return value, an error will be thrown and an error message will be output. By  getLastErrMsg  you get an error message, or by  getLastError  to get the error code. For error handling, please refer to the  common error handling guide  .

error

The error information is recorded in the node diagnosis log (diaglog), and you can refer to the error code .

Example

Separate a node from group1 and add it to group2 as follows:

Node information before attachNode:

db.listReplicaGroups()
{
  "Group": [
    {
      "HostName": "hostname1",
      "Status": 1,
      "dbpath": "/opt/sequoiadb/database/data/11830/",
      "Service": [
        {
          "Type": 0,
          "Name": "11830"
        },
        {
          "Type": 1,
          "Name": "11831"
        },
        {
          "Type": 2,
          "Name": "11832"
        }
      ],
      "NodeID": 1007
    }
    ......
  ],
  "GroupID": 1002,
  "GroupName": "group1",
  "PrimaryNode": 1002,
  "Role": 0,
  "Status": 1,
  "Version": 7,
  "_id": {
    "$oid": "580adfd531ae32109e38ca29"
  }
}
......
{
  "Group": [
    {
      "HostName": "hostname2",
      "Status": 1,
      "dbpath": "/opt/sequoiadb/database/data/11840/",
      "Service": [
        {
          "Type": 0,
          "Name": "11840"
        },
        {
          "Type": 1,
          "Name": "11841"
        },
        {
          "Type": 2,
          "Name": "11842"
        }
      ],
      "NodeID": 1000
    }
    ......
  ],
  "GroupID": 1000,
  "GroupName": "group2",
  "PrimaryNode": 1000,
  "Role": 0,
  "Status": 1,
  "Version": 7,
  "_id": {
    "$oid": "580adfd531ae32109e38ca27"
  }
}

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